5th Pennsylvania Reserve Regiment

The 5th Pennsylvania Reserve Regiment was a Union Army regiment which was active from 20 June 1861 to 13 June 1864 during the American Civil War. It was organized in Harrisburg, Pennsylvania with John Irving Gregg as its colonel, and it was attached to the Army of the Potomac during the war, first fighting in the Seven Days' Battles and fighting in every major battle until the Battle of Cold Harbor, after which the regiment was mustered out.